The 36-year-old fashionista invited ET to her hometown of Waco, Texas, over the weekend, for a ride-along to her Jessica Simpson Collection charity event at Dillard’s. During our interview, the blond beauty shared a few unknown facts about how she keeps her hot bod in tip-top shape.

The singer told ET the secret to her luscious, bouncy tresses is “Texas,” while “family” is the reason for her incredibly toned legs. She also credits a “push up bra” for giving her chest the perfect boost it needs so she can rock those low-cut dresses.

As for where she gets that killer body confidence?

“Sex,” she answered, when asked, “What’s the secret to feeling great about your body?”

While Simpson had no problem spilling those secrets, she was a little hesitant to share the key to a sexy marriage with husband Eric Johnson.

“I can’t give that away or you’ll all have a sexy marriage like me,” she exclaimed.

But that didn’t stop her from gushing over their 5-year-old daughter, Maxwell, who walked the runway at the charity soiree. She also shares a son, 3-year-old Ace, with Johnson.

“I’m so excited to see some of my friends and meet my fans here in Texas and just to be home,” she said. “It’s exciting. All of my family is here and my daughter is going to be in a runway show, like, what?!”

She also confirmed it won’t be too much longer before fans will get to hear new music.

“Well, I can’t let all of my secrets out, but there is a lot of music that you are about to hear as soon as I want you to hear it,” she explained.

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